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Title: [v2] Dispatcher/ServerRunner receive-path swap — replaces BaseSession by maxisbey · Pull Request #2710 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: [v2] Dispatcher/ServerRunner receive-path swap — replaces BaseSession by maxisbey · Pull Request #2710 · modelcontextprotocol/python-sdk

X Title: [v2] Dispatcher/ServerRunner receive-path swap — replaces BaseSession by maxisbey · Pull Request #2710 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - [v2] Dispatcher/ServerRunner receive-path swap — replaces BaseSession by maxisbey · Pull Request #2710 · modelcontextprotocol/python-sdk

Open Graph Description: V2 server receive path: Transport → JSONRPCDispatcher → ServerRunner → Server, replacing the BaseSession/ServerSession message loop. Consolidates the stack under #2562 into one PR against main. Wha...

X Description: V2 server receive path: Transport → JSONRPCDispatcher → ServerRunner → Server, replacing the BaseSession/ServerSession message loop. Consolidates the stack under #2562 into one PR against main. Wha...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2710

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Files changedhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/files
[v2] Dispatcher/ServerRunner receive-path swap — replaces BaseSessionhttps://github.com/modelcontextprotocol/python-sdk/pull/2710#top
maxisbeyhttps://github.com/maxisbey
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maxisbeyhttps://github.com/maxisbey
May 28, 2026https://github.com/modelcontextprotocol/python-sdk/pull/2710#issue-4543322032
Please reload this pagehttps://github.com/modelcontextprotocol/python-sdk/pull/2710
#2562https://github.com/modelcontextprotocol/python-sdk/pull/2562
#2691https://github.com/modelcontextprotocol/python-sdk/pull/2691
#2562https://github.com/modelcontextprotocol/python-sdk/pull/2562
AI Disclaimerhttps://gist.github.com/maxisbey/6123d132484e4c533eab519a2800693d
Please reload this pagehttps://github.com/modelcontextprotocol/python-sdk/pull/2710
maxisbeyhttps://github.com/maxisbey
June 1, 2026 14:46https://github.com/modelcontextprotocol/python-sdk/pull/2710#commits-pushed-cfe3ae4
https://github.com/maxisbey
feat: add Dispatcher Protocol and DirectDispatcherhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/cfe3ae4921671ae08c9a6d159da1c4d8b1df6b8a
cfe3ae4https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/cfe3ae4921671ae08c9a6d159da1c4d8b1df6b8a
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fix: address coverage gaps and stale RequestSender docstringhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/f53b056c4c2cff734244873da4b8daf74fd41144
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refactor: rename Dispatcher.call to send_request, replace RequestSend…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/2e2b2d7e2985b2be38f47fd4de74ae4e8df8a595
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refactor: rename Outbound.send_request to send_raw_requesthttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/b5cf7560728ad15181ac4cd4ab18c566cbdcf12e
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feat: JSONRPCDispatcher outbound side + parametrized contract testshttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/163d38f9d9592000b98125a1d6c5e5e074c4c511
163d38fhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/163d38f9d9592000b98125a1d6c5e5e074c4c511
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feat: JSONRPCDispatcher receive loop and dispatch (chunk b)https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/4739744686b183e880ea680a72f69728b5e79b3d
4739744https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/4739744686b183e880ea680a72f69728b5e79b3d
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feat: JSONRPCDispatcher exception boundary (chunk c)https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/62a555b1680f8935204df9fdede29cff799c8435
62a555bhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/62a555b1680f8935204df9fdede29cff799c8435
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test: JSON-RPC-specific dispatcher tests + coverage to 100%https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/72913ad6bacc0020df331be0ca3671c9b2831722
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ci: run full matrix on PRs targeting any branchhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/e0ca9bc5b0db5f01a7a3863f1c70a59c6bf95a3e
e0ca9bchttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/e0ca9bc5b0db5f01a7a3863f1c70a59c6bf95a3e
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test: address 3.11/3.14 coverage instrumentation quirkshttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/afc1789004941aaff29fa8bab71c940ff497889c
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refactor: rename send_request to send_raw_request in JSONRPCDispatcherhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/f8f350e33d169d0e7271f3ba383056006b19815e
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feat: PeerMixin and Peer wrapperhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/689b78486daebd74b82af45b1390b4f8229065a2
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refactor: follow Outbound.send_raw_request rename in PeerMixin/BaseCo…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/efd7df7b188f1d817f2224771944cede742bf018
efd7df7https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/efd7df7b188f1d817f2224771944cede742bf018
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feat: Connection, server Context, typed send_request, meta kwarghttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7d18a7daa21e6aa3d1fb5bce342f4a1c94e7b807
7d18a7dhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7d18a7daa21e6aa3d1fb5bce342f4a1c94e7b807
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test: close PR3 coverage gaps to 100%https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/551cacb5e210cf9a1b3780bbe0017862f9c28531
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test: move asserts inside async-with for 3.11 coverage instrumentationhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/445f99aeeaa8ecb2c17ffbeafccad2eb1cfecd08
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docs: drop development-journal language from docstrings/commentshttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/63be3e474244ceb3493bc2705c4066d95ce18f12
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refactor: make BaseContext/Context covariant in their type paramshttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/786bc55a83a47f04f79cc8c9562d1aad6580bfbd
786bc55https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/786bc55a83a47f04f79cc8c9562d1aad6580bfbd
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feat: ServerRunner skeleton — _on_request, initialize, init-gatehttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/958bdd71a1b31055db42610d8f86c695a717e06e
958bdd7https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/958bdd71a1b31055db42610d8f86c695a717e06e
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feat: ServerRunner middleware (two-tier) + _on_notifyhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/fb8105621596ce2712fe4abf1a2ba86517debb57
fb81056https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/fb8105621596ce2712fe4abf1a2ba86517debb57
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feat: ServerRunner.run() and otel_middlewarehttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/954874b57f20eb928b4a705ba40b1fd091fa4c61
954874bhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/954874b57f20eb928b4a705ba40b1fd091fa4c61
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test: ServerRunner coverage to 100% — otel span assertions + connecte…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/87579dac9dc18d2e163f8d8d3643e6aad146ed6e
87579dahttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/87579dac9dc18d2e163f8d8d3643e6aad146ed6e
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test: converge span capture on capfire to fix xdist order-dependencehttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/a19735b521749d850c382fa348be2cf8c8ffa7a5
a19735bhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/a19735b521749d850c382fa348be2cf8c8ffa7a5
https://github.com/maxisbey
feat: Server registry stores HandlerEntry; ServerRunner consumes Serv…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7123dd98e813e627d75a23071aa45e791ceee12b
7123dd9https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7123dd98e813e627d75a23071aa45e791ceee12b
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feat: Connection.state + exit_stack; ctx.session_id/headers; Transpor…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/c46b52985fba6bc950d1e32d8d73ca1e72ba780f
c46b529https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/c46b52985fba6bc950d1e32d8d73ca1e72ba780f
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fix: JSONRPCDispatcher coerces string response/progress IDs to int fo…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/47989e7e03fc2dc8e000f0bfa6b5f9bdf906b3a8
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June 1, 2026 15:46https://github.com/modelcontextprotocol/python-sdk/pull/2710#event-26195710686
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June 2, 2026 12:07https://github.com/modelcontextprotocol/python-sdk/pull/2710#commits-pushed-7234f0e
https://github.com/maxisbey
feat: DispatchContext.message_metadata passes SessionMessage.metadata…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7234f0eeee91e343dc11d24f410065dab63416bc
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feat: DispatchContext.request_id; drop RequestId arg from transport_b…https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/b87060de13b49644e632f6eb0c4703ecd3a37890
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June 4, 2026 09:48https://github.com/modelcontextprotocol/python-sdk/pull/2710#commits-pushed-7cbfd0f
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test: gh-106749 heal in StreamingASGITransport.__aexit__https://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7cbfd0f4b987a15fd52aa71dfd377f9fd35d9c74
7cbfd0fhttps://github.com/modelcontextprotocol/python-sdk/pull/2710/commits/7cbfd0f4b987a15fd52aa71dfd377f9fd35d9c74
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